How to Specify Source Code When Debugging in Eclipse

You can have multiple application projects in Eclipse. You can use Eclipse to start a weblogic server in the debug mode. And then you can debug your web applications deployed to the weblogic server. You may want to debug into the source code of the libraries used in your application. For example, you may want to debug into the jsf-impl.jar. You may use different versions of jsf-impl in different applications. So how to use the source code that matches the library? It is actually easy. The following are the steps.

1. In eclipse, go to "Run --> Debug configurations...". This will open the configuration screen.
2. In the screen, the left pane shows a list of the programs. Click on the one you are using. In this example, it is "Oracle Weblogic Server 11gR1 PatchSet 1 at localhost".The right pane will show tabs named "Server", "Source", "Environment", etc.
3. In that right pane, click on the "Source" tab. You will see a list of the projects and files. These are the source code files that eclipse uses to show in debugging.
4. In that right pane, you can use the "Add" button to add source code file. You can also have different versions of the source code for a library. In that case, you can use the "Up" and "Down" button to move the positions of the source code file. The one sitting higher will be picked up.